From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Blueprint of a component's profile with dimensional callouts.
| Identifier | ExFiles\Box 179\3\ img116 | |
| Date | 31th January 1932 guessed | |
| RAD. .500 2.750" RAD. 25 | ||